Allow CL to spawn titans with specific body and head combinations

[AutumnThyme]

There's a lot of potential to improve titan modes by giving some titans unique behaviors. CL can already do this effectively, but there's no good way to visually tip off which CL-spawned titans have specific behaviors. Spawning titans with specific body types would give that visual information.

This could also be very nice for competetive game modes. Inevitably, some body/head types will be easier or harder to attack, and some might be bad for certain game modes (as has been pointed out elsewhere). Being able to precisely control which types spawn, and in what proportions, could remove a lot of randomness in competitive runs.

It would be ideal if titan body type could be read by CL as well. That would allow stuff like implementing nape armor for certain titan body types, and not for others.